Paper-feeding mechanism.



H. c. GAMMETBR.

PAPER FEEDING MECHANISM.

APPLICATION FILED DEG. 4, 1909.

Patented Dec. 10, 1912.

' 2 snnn'rs-snmi 1.

. H. 0. GAMMETBR.

PAPER FEEDING MECHANISM.

AYPLIOATION FILED DBO. 4, 1909.

1,047,037. r Patented Dec.10,1912. I r v z snnnws-snnm 2.

7 fi I :59 @527? 4'2 fm/Enfar UNITE STATES PATENT OFFICE.

HARRY o. GAMIVIETER, or BnArnnaHL, onto, Assmnoa TO THE AMERICAN MULTIGRAPH COMPANY, or CLEVELAND, OHIO, A. CORPORATION or OHIO.

PAPER-FEEDING MECHANISM.

To all whom "it may concern:

Be it known that I, HennrC. GAMMETER, a citizen of-the United States, residing at Bratenahl, in. the county of Quyahega and State of Ohio, have invented a certain new and useful Improvement in Paper-Feeding Mechanisms, of which the tollowin is a full, clear, and exactdescription, reerence being had to the accompany ng drawings.

The object of this invention is to provide a powerful and accurate paper feeding device for feeding individual sheets of paper. My device may well be associated with a rotary printing machine and driven byit, and it operates to take each successive sheet and feed it exactly-at the desired time to the line of contact of the printing drum and platen, so that the printing maybe in accurate register. lVhen the paper feeding mechanisms with which I am familiar are applied to rotary machines, there is more or less difiiculty in the registration, one imprint being slightly differently placed on the sheet from a succeeding imprint, owing to varia tions in driving force, different thicknesses of paper, et cetera. The present invention is designed primarily to remedy this.

The invention consists of the means I employ for. attaining the ends above'referred to, as illustrated herein and hereinafter more fully described. I

In the drawings,-Figur:e l is a yertical section through the rotary printing machine havingm y paper feeding mechan sm; Figs. 2 and 3 are end views, partly sectional, of the paper feeding mechanism looking from the opposite direction of Fig. 1,-Eig. 2 showing the normalor idle position of the parts,Fig. 3 showing the mechanism after the operation has begun; Fig. 4 is a plan, partly sectional and partly broken away,.of the feeding mechanism and the platen; and Fig. 5 is a sectional front view, not looking as far back as the platen. Fig. 6 is a substantially horizontal section through the support for the right hand end of the lower feed roll.

As shown in the drawings, the frame of the machine has a horizontal btISQ l0 and uprights 11. and 12, the base haying a horizontal top plate 17 which acts as a paper feed table, or constitutes a portion of one.

. 13 indicates the printin' drum Which is mounted between the uprig its on a shaft 14. 5

which may be driven by a crank 15, or other- Specification of Letters Patent." 7 Patented Deg. 10,1912. Application filed neeernpeiwi, 1909. SerialNo. 531,452. I

manner, as, for passing .oyer the" type and ha-vin ends earned on spools 19 and 2% rotatablymounted in the interior of the drum opposite a recessor opening 22 there in. The type on the drum cooperate with a suitable platen 25 having a soft rubber exterior and mounted on a shaft 26 parallel with the shaft 14. The platen is shhwn as driven concurrently with the printing drum by gears 27 and 28 on the respective members.

I provide a pair of constantly driven paper feed rollers 30 and 31. Each'of these rollers is preferably made sectional and consists of soft rubber separated spools mounted on shafts 32 and 33. respectivdy, the mounting being accomplished by intermediate sleeves 3stc which may be pinned to the shaft. The shaft 32 is mounted in a frame comprising arms 39 on a'rock shaft 42 and is given an upward pressure by the spring 4.6 connected at one end to an arm 45 depending from the rock shaft and anchored at the other end to the frame. The shaft 33 is mounted in a pivoted frame com rising a bar 50 liavin ears 51 by Which it is pivoted at 52 to the 'rame, the shaft being mounted in forwardly extending ears 53 on the bar. To constantly drive both rollers, I mount on the ends of the shafts 32 and 33 meshing gears 35 and 37, and the gear 36 meshes with an idler 38 which meshes with the platen gear 27.

Though the feed rollers 30 and 31 are con stantly driven in the direction to feed paper to the printing machine, they are normally ineffective to cause such feed by reason of being out 'of contact with each other; furthermore, the paper ispositively locked against feed by the upwardly projecting lips 40 on rock arms 41 projecting rearwardly from the shaft 4-2 between the sections of the roller 30. i As shown, the rock shaftconsists of a bar 42 from which the arms integrally project, and each bar is pivotally mounted at its ends by the pivot pins 4-3 screwing through the frame members into bosses 4.4 on the bar.

The spr ng gi e he u a onsta tendency to rock in the direction to force the lips t p a y aga nst the un fa of the bar 50, which. carries the feed roller 33. This latter bar has a forwardly extending arm 56 surrounding a stationary stud 57, and is pressed upwardly by a spring 58 around this stud, suitable nuts 59 on the stud forming an upward limit for the arm. This arm also carries a roller 60 which is adapted. to be engaged by a cam 61 on the printing drum.

Normally, the position of the parts is as shown in F ig. 2, the lower portion of the cam 61 (or the absence of the cam) allowing the spring 58 to keep the feed rollers separate, though tl1Qll\ 8l1S 36 and 37 are in mesh. In this position the spring 4:6 keeps the lips 40 against the bar 50. \Vith the parts in this position, the paper is fed by hand, or otherwise, until its rear edge abuts the lips 40. Now", when the cam proper 61- strikes the roller 60, the bar 50 is swung downwardly on its pivot and the roller 31 comes into active coaction with the roller 80. This same movement depresses slightly the roller 30, Swinging that .roller and its supporting arms 39 down- \vardl y about the pivots 43, thereby drawing down the lips 40 to freethe paper. The play between the teeth of the gears 36 and 38 allows this movement without binding. \Vith the parts in the position shown in Fig. 3 the paper is'positively gripped between the two soft rollers and fed rearwardly to the line of contact of the printing drum and platen. While the cam is in engagement, the spring 46 holds the feeding rollers in proper frictional contact to effectively feed" the paper.

The feed rollers may be adjusted into perfect parallelism by the eccentric bushing 65, in the arm 39, which forms the journal for the shaft 32 and is locked in adtiming is necessarily efl'cctive; furthermore,

the upper feed roller does not: come down to a definite plane, but pushes down onthe elastiativ-siipported under-roller, so that the frictional grippingof the paper is dependent upon the force of the spring 46. This enables the mechanism tomgripe paper of different thickness with equal positiveness, which would not be the case if the cam were relied upon to force one roller into engagement with another mounted on a positive axis. e

Having thus described I claim is:

1. In a paper feedingfmechanism the my invention, what combination of a pair of rotatable feed rolls both bodily movable, mechanism periodically causing them to approach and both more bodily in the same direction after they have approached, and a front stop rendered inactive by such movement.

2. In a paper feeding mechanism, the combination of a pair of feed rolls, both mounted on movable axes and normally out of engagement, means periodically forcing one roll against the other and thereafter moving the two rolls bodily together in the same direction, and a front stop rendered inactive by such movement.

3. In a paper feeding mechanism having a pair of feed rolls, both mounted on movable axes and normally out of engagement. means forcing one roll against the other and two rolls bodily in the same direction against a spring resistant, and a front stop rendered inactive by such movement.

4. In a paper feeding mechanism, the combination, with a pair of feed rolls mounted parallel and both of them bodily movable and normally out of contact. means periodically and automatically forcing HlKl rolls into contact by moving one roll toward the other and then both rolls simultaneously as;a continuation of such movement, and a front stop rendered inactive by such movement.

5. In a paper feeding mechanism, the combination with a pair of feed rolls mounted parallel and both of them bodily movable and normally out of contact, means for toreing said rolls into contact by moving one roll toward the other and then both rolls simultaneously as a continuation of such movement, and gears on the two rolls meshing both when they are separated and together.

- 6. In a paper feeding mechanism, the

combination with a pair of feed rolls mounted parallel and both of them bodily movable and normally out of contact, gears constantly connecting said rolls, means for forcing said rolls into contact by moving one roll toward the other and then both rolls simultaneously as a continuation of such movement, a spring tending to resist: such continued movement, and a driving gear,

-constantly meshing with one of the gears mentioned.

7. In a paper feeding mechanism. the combination with a pair of feed rolls mounted parallel and both of them bodily movable and normally out of contact, means periodically forcing said rolls into contact by mo ving one roll toward the other and then both rolls simultaneously as a continuatign of such movement, and a stop for the paper which acts until after the rolls have engaged and is withdrawn by such continued movement.

8. In a paper feeding mechanism, the

combination with a pairof feed rolls mounted parallel and both of them bodily movable and normally out of contact, ineans periodically and automatically forcing saidrolls into contact by moving one roll toward the otherand then both rolls bodily simultaneously as a continuation of such movement, a spring tendiiig to resist such continued movement, and a stop for the paper which acts until after the rolls have engaged and is withdrawn by such continued movement.

9. In a paper feeding mechanism, the combination of a pair offeed rolls, a spring acting on one roll and tending to move it awayfroin the other, and a spring acting on the other rolland tending to move it to ward the first, and stops for such movement.-

10. In a paper feeding mechanism, the, combination of a pair of feed rolls, a spring acting on the first roll and tending to move .it away from the second, a spring acting on the second roll and tending to .move it toward the first, a stop for the paper which acts also as a stop for, such movement of the second roll, and meansfor automatically removing the stop consequent upon the movement of the second roll. A

'11. In a paper feeding mechanism, the

cornbination'of a feed roll, a pair of pivoted arms carrying the same, a spring tending to swing said arms on their pivot and move the roll, a cohperating feed roll, a spring tending to move it to-separate the rolls, and means for forcing said rolls together against the action of both springs.

12. In a paper feeding mechanism, the combination of a feed roll, a frame carrying the same, a spring tending to swing said frame on its ivot and move theroll, a coe0 operating fee roll, a,pivoted frame carrying it, and a sprlng tending to movesaid last-mentioned frame to separate the rolls 13.;In a, paper feeding mechanism, the

combination of a pair of feed rolls, a pair of pivoted frames carrying the same,

springs actingon said frames, one of the framesbeing pivoted on the front side of its feed roll and the other on the rear side of its feed roll, and means -for swinging the frameson their pivots. i v

14. In a paper feeding mechanism, the combination of a pair of feed rolls, a pair of pivot-2d frames carrying the same, springs acting-on said frames, one of the frames being pivoted on the front-side of its feed roll arid the other on the rear side of" its feed roll and one of the frames being stopped by having a portion abutting the) other frame, and means for swinging said other frame on its pivot to change the posi- L'iOIl of-both feed rolls' andthereby remove the stopping portion. i 15. The combination of a Ipair of normally separ te bodily movab e rolls both mounted on movable journals geared together, fofia paper' feeding mechanism-1, having t l se h r gears and, the

unisom-a pairof individual pivoted frames feed rolls, 55 and a stop or the "paper acting until after they have come into engagement and auto matically removed by thebodily movement of both rollswhen in gripping engagement. 16;1he combination of a pair of feed 0 and normally-out of contact, mechanism for 7 not only moving one feed roll toward the other tb bring them into effective contact, but alsov to continue to move the two to-' gether, stop for the paper adapted to retain itS;:St0PPlng position until after the rolls have come into engagement, means whereby the continued movement withdra wethe stop, and a spring resisting such con tinued movement; v A 17. The combination of a pair of con-- stantly driven feed rolls geared togetherand both moniitedonmovable j onrnals and normally but of contact, mechanism for .moving one feed: roll'toward the other to 5 bring them into effective contact and also to continue to movethe two together, a stop for the paper, and means whereby the continued movement withdraws the stop.

'18. In" a paper feeding mechanism, the

combination of a "pivoted frame, a feed roller carried thereby, a cam roller carried the frame, a spring pressing the frame in oppositionto. the cam roller,'a second pivoted frame, a feed roller carried thereby, 95.

and a spring pressing said feed toilet toward' the feed mixer, first mentioned; I

19. Iii a paper'- feeding mechanism, the combination of; a pivoted ,framcfa" roller carried thereby, a cani roller by the frame, a spring pressing the frame in 0 position to theatre ro'ller,'a second pivote frame, a feed roilerqcarried therehyg'a spring pressing said feed-roller toward the feed roller first mentioned, and a stop for the paper ".carried by the second'pivoted frame. i

2-0. The combination, with a rotary printing machine having a drumand platen geared together, of a paper feeding mechanism having a pair'of feed rollers geared with the printingi mechanism, a pair of individual pivotediframes' for carrying the two feed rollers',' a;can on the drum adapted toa'cton onvofthe frames, and springs acting on both "frames and pressing them toward the cam. w

21. The; bination, with a rotary printing mach ne aving. a drum and platen r offeed rollers cared v l er between once such g air; of; the printing'mechanism, wherebylfall such parts aredriven in pai d mes, tapdi s rings acting on both frames P smgt em toward thecam- 22. ln'jej paper feedingmeehanism, the'13 combination of a pivoted frame, a feed iollir carried thereby, stop lips carried by the frame, a spring acting on the frame and tending to move said lips into the path of the paper, a cooperating feed roller, and means for pressing it-againstthe feed roller mentioned to make a gripping contact and displace the feed roller sufiieiently to swing the frame towithdraw the lips from the path of the paper. 4 23. In a paper feeding mechanism, the combination of a pivoted frame, a feed roller carried thereby, stop lips carried by the frame, a spring acting on the frame and tending to move said lips into the path of the paper, a cooperating feed roller, a second pivoted frame carrying said cooperating feed roller mentioned, and a spring-act-- ing on that frame tending to separate the feed rollers.

v24. In a paper feeding mechanism, the con'i-bination with a printing drum and a 00- .operating roller platen, a pair of feed rollers mounted beneath the drum and in front of the platen, a pivoted frame supporting the lowermost of said feed rollers, gearing between the latter feed roller and the platen, a pivoted, frame supporting the u per feed roller, gearing between the upper flied roller and the lower feed roller, a cam on the drum, and a roller on the upper frame which said cam may engage.

25. In a paper feeding mechanism, the combination with printing drum and a cooperating platen geared therewith, a pair.

of feed rollers mounted beneath the drum and in front of the platen, a pivoted frame supporting the lower feed roller, gearing between the latter teed roller and the platen, a pivoted frame supporting the upper feed roller, gearing between the upper feed roller and the lower feed roller, a cam on the drum, a roller on the upper frame which said Cain may engage, springs tendingto elevate both frames, and stop lips carried by rearwardly extending arms on the lower frame, said lips in active position abutting the under-face of the upper frame. 26. In a paper feeding mechanism, the combination of a pivoted frame, a feed roller carried thereby, stop lips carried y thz' frame, a spring acting on the frame and tending to move said lips into the path ol the paper, a second feed roller, and a second pivoted frame carrying the :-(\O1i(l feed roller mentioned, said stop lips in normal. position engaging said second frame.

'27. in a paper feeding mechanism. the combination of apivoted frame, a feed roller carried thereby, stop lips carried by the fra1nc,: a second pivoted franw which said lips engage \vhcnin the path of the paper. a cooperating feed roller carried by said second pivoted frame, aml meansv for pres ing it against the feed roller nwntioned to malna. gripping" contact and displace the feed roller sntliciently to swing the tint-mew tioned frame to withdraw the lips from the path of the paper.

In tcstimon; where f, I hereunto atlix my signature in thr presence of two witnesse l'lfiltllY i. (.ntllhlld'ilfili.

ll'it nesscs:

i-kmzmrr ll. liA'rI-is, A. J. Henson.

, Copies of this patentmay be obtained for five cents each. by addressing the Commissioner of Patents.

Washington. D. C.

Ill 

